[clang] [llvm] [RISCV] Add Hazard3 CPU (PR #102452)

[Min-Yih Hsu via cfe-commits]

mshockwave wrote:

> So for this particular PR, we just need a name people are happy with (perhaps check if the vendor has a preference?). Something like `-mcpu=rp2350-hazard3` perhaps?

+1 on `-mcpu=rp2350-hazard3` over `-mcpu=raspberrypi-rp2350` because the former is more specific to the RISC-V part of RP2350.

https://github.com/llvm/llvm-project/pull/102452